Adell has also enjoyed a successful film career. She gained critical acclaim for her performances in the independent films The NeverEnding Story II: The Next Chapter (1990), Therapy and Practice (2002), Pommery and Leichenschmaus (2006), and Love and Fate (1998). She has had her greatest commercial successes with the films Marienhof.

While appearing on Marienhof, Adell also started segueing into film roles. She made her film debut in 1990's The NeverEnding Story II: The Next Chapter, which was commercially successful and gained a cult following. Soon after that she played a supporting role in the international movie Night Train to Venice alongside Malcolm McDowell and Hugh Grant, which was negatively reviewed by critics. Adell pursued film work in 1996, when she played supporting roles in the independent films Die Cellistin, and 2002 Therapy and Practice. Adell was a cast in the popular TV-series “Café Meineid” and “Marienhof”.

At the latest with her part of a young secretary in a lawyers office in Eva – ganz mein Fall (the German adaptation of Ally McBeal) she was known by a huge public. In this TV-Serie “Eva, ganz mein Fall” she played Audette Mende, who works in the turbulent lawyers’ milieu. The secretary Audette Mende, smart-alec and philanthropic, tries to fight for justice in and outside the office and knows every secret about the company and the employees.[3][4]

Adell starred in the US-movie production, A Gothic Tale of Gluttony, where she played the role "Eudile", the talented harpist-diva, who wants to improve the world with her motto "music should alleviate the soul!".[5]

Adell is also a musical artist. She released an album with 18 pop songs for children in connection with the educational game Gaenseliesel in 1996. in 2003 she launched the album Angel Unplugged. Already in 1996 she had founded her charity organization, a music album program designed to bring the joy of song- and story- writing, musical creation and performance to children with illness. The program is made for improving the quality of life of every child with illness through the healing power of creativity.

Adell performed as a soloist in many of the most important European National Theatres, such as the National Opera House of Munich, Royal Opera Bayreuth, Philharmonics Cologne, State theatre of Gaertnerplatz. Cuvilléstheater Munich, Apollo Theater Stuttgart, Ingolstadt Metropolitan Theatre, Fürth Metropolitan Theatre, Deutsches Theater Munich, Theater Hof, Interim Theater.

Adell is the founder of a non-profit organization that helps children with severe illnesses and cancer patients. In addition she volunteered in cancer research. Furthermore for many years she dedicated her time to visit cancer patients in different hospitals to bring them hope and "good vibrations" by singing for and with them. Adell donated her whole annual theatre income of 2010 to medical cancer research. In addition, Adell is a supporter of a non-profit organization that helps raise money for cancer patients.